<?php

/*
	Question2Answer (c) Gideon Greenspan

	http://www.question2answer.org/

	
	File: qa-include/qa-external-users-wp.php
	Version: See define()s at top of qa-include/qa-base.php
	Description: External user functions for WordPress integration


	This program is free software; you can redistribute it and/or
	modify it under the terms of the GNU General Public License
	as published by the Free Software Foundation; either version 2
	of the License, or (at your option) any later version.
	
	This program is distributed in the hope that it will be useful,
	but WITHOUT ANY WARRANTY; without even the implied warranty of
	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
	GNU General Public License for more details.

	More about this license: http://www.question2answer.org/license.php
*/

if (!defined('QA_VERSION')) { // don't allow this page to be requested directly from browser
    header('Location: ../');
    exit;
}


function qa_get_mysql_user_column_type()
{
    return 'BIGINT UNSIGNED';
}


function qa_get_login_links($relative_url_prefix, $redirect_back_to_url)
{
    return array(
        'login' => wp_login_url(qa_opt('site_url') . $redirect_back_to_url),
        'register' => site_url('wp-login.php?action=register'),
        'logout' => strtr(wp_logout_url(), array('&amp;' => '&')),
    );
}


function qa_get_logged_in_user()
{
    $wordpressuser = wp_get_current_user();

    if ($wordpressuser->ID == 0)
        return null;

    else {
        if (current_user_can('administrator'))
            $level = QA_USER_LEVEL_ADMIN;
        elseif (current_user_can('editor'))
            $level = QA_USER_LEVEL_EDITOR; elseif (current_user_can('contributor'))
            $level = QA_USER_LEVEL_EXPERT; else
            $level = QA_USER_LEVEL_BASIC;

        return array(
            'userid' => $wordpressuser->ID,
            'publicusername' => $wordpressuser->user_nicename,
            'email' => $wordpressuser->user_email,
            'level' => $level,
        );
    }
}


function qa_get_user_email($userid)
{
    $user = get_userdata($userid);

    return @$user->user_email;
}


function qa_get_userids_from_public($publicusernames)
{
    global $wpdb;

    if (count($publicusernames))
        return qa_db_read_all_assoc(qa_db_query_sub(
            'SELECT user_nicename, ID FROM ' . $wpdb->base_prefix . 'users WHERE user_nicename IN ($)',
            $publicusernames
        ), 'user_nicename', 'ID');
    else
        return array();
}


function qa_get_public_from_userids($userids)
{
    global $wpdb, $qa_cache_wp_user_emails;

    if (count($userids)) {
        $useridtopublic = array();
        $qa_cache_wp_user_emails = array();

        $userfields = qa_db_read_all_assoc(qa_db_query_sub(
            'SELECT ID, user_nicename, user_email FROM ' . $wpdb->base_prefix . 'users WHERE ID IN (#)',
            $userids
        ), 'ID');

        foreach ($userfields as $id => $fields) {
            $useridtopublic[$id] = $fields['user_nicename'];
            $qa_cache_wp_user_emails[$id] = $fields['user_email'];
        }

        return $useridtopublic;

    } else
        return array();
}


function qa_get_logged_in_user_html($logged_in_user, $relative_url_prefix)
{
    $publicusername = $logged_in_user['publicusername'];

    return '<a href="' . htmlspecialchars($relative_url_prefix . 'user/' . urlencode($publicusername)) .
        '" class="qa-user-link">' . htmlspecialchars($publicusername) . '</a>';
}


function qa_get_users_html($userids, $should_include_link, $relative_url_prefix)
{
    $useridtopublic = qa_get_public_from_userids($userids);

    $usershtml = array();

    foreach ($userids as $userid) {
        $publicusername = $useridtopublic[$userid];

        $usershtml[$userid] = htmlspecialchars($publicusername);

        if ($should_include_link)
            $usershtml[$userid] = '<a href="' . htmlspecialchars($relative_url_prefix . 'user/' . urlencode($publicusername)) .
                '" class="qa-user-link">' . $usershtml[$userid] . '</a>';
    }

    return $usershtml;
}


function qa_avatar_html_from_userid($userid, $size, $padding)
{
    require_once QA_INCLUDE_DIR . 'qa-app-format.php';

    global $qa_cache_wp_user_emails;

    if (isset($qa_cache_wp_user_emails[$userid]))
        return qa_get_gravatar_html($qa_cache_wp_user_emails[$userid], $size);

    return null;
}


function qa_user_report_action($userid, $action)
{
}


/*
	Omit PHP closing tag to help avoid accidental output
*/